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An intelligent control stand-alone doubly-fed induction generator (DFIG) system using proportional-integral-derivative neural network (PIDNN) is proposed in this study. This system can be applied as a stand-alone power supply system or as the emergency power system when the electricity grid fails for all sub-synchronous, synchronous and super-synchronous conditions. The rotor side converter is controlled...
This paper compares real and reactive power control for a DFIG (doubly-fed induction generator) based wind turbine system using stator-voltage and stator-flux oriented frames. The paper presents DFIG steady-state and transient models in d-q reference frame. The steady-state model is used to obtain the general relationship between the rotor d/q current and stator real/reactive power references using...
The doubly-fed induction generator (DFIG) is a 'special' variable speed induction machine widely used in modern large wind turbines. It is a standard, wound rotor induction machine with its stator windings directly connected to the grid and its rotor windings connected to the grid through a back-to- back PWM converter. The DFIG power generation consists of power delivered from two paths, one from...
With the advance of power electronic technology, direct driven permanent magnet synchronous generators (PMSG) have drawn more and more interests to wind turbine manufactures due to the advantages in PMSG wind turbine integration with the electric grid. This paper focuses on the analysis of PMSG characteristics through computer simulation. Compared to other analytical approaches, the specific features...
In this paper, a new predictive direct power control (DPC) technique is presented for the doubly fed induction machine (DFIM). Based on this predictive control, the strategy is able to operate at considerably low constant switching frequencies and allows it to perform a power ripple minimization technique, in order to improve the steady-state and transient response behaviors of the machine. In addition...
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